【摘要】 针对蜂窝网中某一基站处于休眠状态时引起各用户的通信中断问题,提出利用中继协作通信实现跨小区多跳通信的迭代中继选择算法。该算法是在有多个中继节点可为目的节点提供协作中继时,将源节点到目的节点的数据传输分为3个连续时隙,选择满足目的节点信噪比最大化的中继,以协作效率为依据删除协作效率最小的中继节点,从而逐次优化中继选择结果。仿真结果表明,该算法在跨小区多跳的通信过程中,能选择出协作效率最高的中继节点,减少协作中继的数量,可以减少中继对能源不必要的消耗,改善小区内中继协作效率,在多跳的过程中节省源节点的发射功率,从而达到能效优化的目的。更多还原

【Abstract】 In this paper, a research is done based on the condition that one of the base stations in the cellularnetwork is in sleep mode, caused the problem of communication interrupt. Using cooperative relays as the iterativerelay selection algorithm is proposed to realize cross-cell multi-hop communication. This algorithm is in the situationthat there are many relays can provide cooperative relay for destination node, dividing the data transmission fromsource node to destination node into three consecutive slots, choose the relay based on collaborative efficiency, todelete the nodes with lowest collaborative efficiency in each iterative process, to recurrently optimize the results ofthe relay selection, until destination node’s signal-noise ratio maximization. The simulation results show that, theproposed algorithm during the cross- cell multi- hops communication, can select the relay node with the highestcollaborative efficiency, to reduce cooperative relays, this can not only save the unnecessary energy consumption, butalso improve collaborative efficiency of the relays in cellular network. Saving source node’s sending power duringthe multi-hop to realize energy efficiency’s optimization.更多还原